进油前贯通试压应注意哪几个方面。
参考答案：
①对于检修中更换的新设备，工艺管线贯通试压前必须进行水冲洗。水冲洗时机泵入口须加过滤网，控制阀要拆法兰，防止脏物进入机泵、控制阀；
②贯通试压时控制阀应改走副线；
③炉管贯通时应一路路分段贯通；
④对于塔、容器有试压指标要求的设备，试压时人不能离开压力表，密切注意压力上升情况，防止超压损坏设备；
⑤试压时要放尽蒸汽中冷凝水，防止产生水击，水击严重时能损坏设备、管线。
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